| http://www.w3.org/ns/prov#value | - The method of producing a die having shearing surfaces formed by a hard metal such as tungsten carbide, which comprises forming an aperture in a base of a softer metal than said hard metal, securing a pair of blocks of said hard metal in spaced relation onto a bar of a softer metal than said hard metal, grinding the confronting end surfaces of said blocks to produce an interval of precisely predet
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